Mr 650 wrote on 12/31/69 at 16:00:09:


While you have it apart, change all the screws to stainless allen head bolts.  Much easier to deal with.

I'd like to see how your needle change goes.  That could be one definitive answer for the 4 years that I've heard of people removing the spacer.  Keep us posted when you are below 80  

Mr 650 wrote on 12/31/69 at 16:00:09:


It will be interesting to see the results of your measuring.

What's up with the white spacer thickness of .087"?   ???  Isn't that thinner than the other ones?  I wonder if the spacers have changed over the years too.

ATTN;Paladin
Savage_Greg wrote on 12/31/69 at 16:00:09:


That is a very good question.
W/o further info I will split the difference and do the #4 washer trick, but that may be too rich. If the X-6 & X-7 needles measure about the same It should run better.

Also a report over on Be_Savafe forum said;

"whyno12@e...> wrote:

> i took the plunge today. put a 155 jet in the scooter, and put a k & n air filter in the stock box. scooter runs like a scalded dog.
made a big difference. i did take the plug out of the mixture adjustment and adjusted the carb out to where it was running good...
that was all the changes i made. the savage starts, runs, and sounds like i think it should. have not changed the muffler as of yet,and not sure i will."

The 155 main seems to be the best place to start w/ a stock muffler and 157.5 w/ open pipe.

The stock carb had a flat spot when the air cooled off after I went to eat, I noticed coming back Thursday night w/ new  Supertrapp pipe on for 1st time.
It backfired big (about a .38 special or 9mm) and had a flat spot just as it came off idle and was slow to rev up.

So I installed the new carb tonight along w/ a K&N filter.

Current config;

157.5 main jet
5C17 needle
X-6 needle jet
white washer reduced to .050 from .088
67.5 pilot jet under diaphragm

The #4 washer's O.D. was too big for the recess in the slide and was binding, so we just filed the white nylon washer down to 50 thou.
I set the idle screw to 3 out, by the book.
My compadre said 'this thing is gonna run like S%#t and you're gonna wind up w/ the stock one back on it'.
I put the big new carb on the bike & as much as I had changed I was surprised, relieved and very happy it cranked at all
In fact Suzy fired right up and idled real good w/o  any choke!

Crack the throttle and it barks, and falls right back to idle, unlike the old one which fell below then back up.
I rode down 1/2 mile  to I-240, up to about 80mph over to next exit about 1/2 mile  and back home, about 3 miles around town. No malfunctions. She pops a little on decel and sometimes as I shift up, but no duck and cover stuff now.
Throttle response was good around town.
I will need to ride it w/ this set-up more and maybe try a 155 main later.
Next need to pull the tank, check the valves and stick a new plug in it before I test top speed.
It's getting late so better not be blasting around town any more tonight. 8)
Gotta say thanks to Greg and everyone here, and at LS650.net http://www.heise-workstations.de/ls650/LS650.html
TheThumper page http://www.thumperpage.com/ and the
Be _Savage folks http://autos.groups.yahoo.com/group/Be_Savage for all the tuning and carb input, oh yeah I got the carb from our new sponsor at Anderson Vintage Parts too.

P.S. I did a snorkel-ectomy to the air box too.

> The #4 washer's O.D. was too big for the recess in
> the slide and was binding

Yes, just a hair too large in diameter. The #4 washer can be chucked in a Dremel tool mandrel and spun against fine sandpaper to reduce it down.

Jon wrote on 12/31/69 at 16:00:09:


I wonder why Mr650's spacer was .088"

Quote:


I was looking at the '86 specs. & bought the jets.
I started w/ a 125 throttle body.
Ron Ayers shows the pilot jet as item ( 12-1 )   09491-67004  
 M/J 67.5 (N102221)  
http://www.ronayers.com/fiche/300_0039/carburetor/carburetor.cfm
The new carb had a 70 pilot jet in it, so I went w/ the 86 spec.
I went to 10 differnt bike shops and the only 67.5  jet I found was the "larger Mikuni" main jet to use under the diaphagm. I turned the O.D. down to match the 70 jet that came in the new carb (and like the 2001).
Also the X-6 needle jet was unique to '86 (I think).
It may or may not be different than the X-7. I had it, so in it went. We both measured the X-6 & X-7 needle and they were the same, so we went w/ the adjustable X-7. I will open the 2001 carb and tell you what I find. I pulled the bowl off and the 01 had a 145 main in it as it should.